Best Mopar engine of all time

Define best. 340 and hemi have huge rep, but short run. Teeners around forever, but little performance love. /6 will last forever and run like a sewing machine but make a teeter look like a powerhouse. Personally I am a fan of the B/RB engines. Produced with little change other than bore and stroke for a very longtime and performed well in everything from motor home duty to drag racers.